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(WFRF:(Minchev I)) srt2:(2015-2019)
 

Sökning: (WFRF:(Minchev I)) srt2:(2015-2019) > The Gaia-ESO Survey :

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00008215naa a2200817 4500
001oai:DiVA.org:uu-270606
003SwePub
008160101s2015 | |||||||||||000 ||eng|
009oai:lup.lub.lu.se:1b0ed2a7-ef6c-4cd3-b4e7-01b9f3893e58
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2706062 URI
0247 a https://doi.org/10.1051/0004-6361/2015258832 DOI
0247 a https://lup.lub.lu.se/record/85395862 URI
040 a (SwePub)uud (SwePub)lu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Guiglion, G.u Univ Cote Azur, Lab Lagrange, CNRS, Observ Cote Azur, F-06304 Nice 4, France.4 aut
2451 0a The Gaia-ESO Survey :b New constraints on the Galactic disc velocity dispersion and its chemical dependencies
264 c 2015-11-02
264 1b EDP Sciences,c 2015
338 a print2 rdacarrier
520 a Context. Understanding the history and the evolution of the Milky Way is one of the main goals of modern astrophysics. In particular, the formation of the Galactic disc is a key problem of Galactic archaeology. Aims. We study the velocity dispersion behaviour of Galactic disc stars as a function of the [Mg/Fe] ratio, which for small metallicity bins can be used as a proxy of relative age. This key relation is essential to constrain the formation mechanisms of the disc stellar populations as well as the cooling and settling processes. Methods. We used the recommended parameters and chemical abundances of 7800 FGK Milky Way field stars from the second internal data release of the Gaia-ESO spectroscopic Survey. These stars were observed with the GIRAFFE spectrograph (HR10 and HR21 setups), and cover a large spatial volume in the intervals 6 < R < 10 kpc and vertical bar Z vertical bar < 2 kpc. Based on a chemical criterion, we separated the thin- from the thick-disc sequence in the [Mg/Fe] vs. [Fe/H] plane. Results. From analysing the Galactocentric velocity of the stars for the thin disc, we find a weak positive correlation between 170 and [Fe/H] that is due to a slowly rotating [Fe/H]-poor tail. For the thick disc stars, a strong correlation with [Fe/H] and [Mg/Fe] is established. In addition, we have detected an inversion of the velocity dispersion trends with [Mg/Fe] for thick-disc stars with [Fe/H] < -0.10 dex and [Mg/Fe] > +0.20 dex for the radial component. First, the velocity dispersion increases with [Mg/Fe] at all [Fe/H] ratios for the thin-disc stars, and then it decreases for the thick-disc population at the highest [Mg/Fe] abundances Similar trends are observed for several bins of [Mg/Fe] within the errors for the azimuthal velocity dispersion, while a continuous increase with [Mg/Fe] is observed for the vertical velocity dispersion. The velocity dispersion decrease agrees with previous measurements of the RAVE survey, although it is observed here for a greater metallicity interval and a larger spatial volume. Conclusions. Thanks to the Gaia-ESO Survey data, we confirm the existence of [Mg/Fe]-rich thick-disc stars with cool kinematics in the generally turbulent context of the primitive Galactic disc. This is discussed in the framework of the different disc formation and evolution scenarios.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653 a Galaxy: abundances
653 a Galaxy: disk
653 a Galaxy: kinematics and dynamics
653 a Galaxy: stellar content
653 a stars: abundances
653 a Galaxy: abundances
653 a Galaxy: disk
653 a Galaxy: kinematics and dynamics
653 a Galaxy: stellar content
653 a stars: abundances
7001 a Recio-Blanco, A.u Univ Cote Azur, Lab Lagrange, CNRS, Observ Cote Azur, F-06304 Nice 4, France.4 aut
7001 a de Laverny, P.u Univ Cote Azur, Lab Lagrange, CNRS, Observ Cote Azur, F-06304 Nice 4, France.4 aut
7001 a Kordopatis, G.u Leibniz Inst Astrophys Potsdam AIP, D-14482 Potsdam, Germany.4 aut
7001 a Hill, V.u Univ Cote Azur, Lab Lagrange, CNRS, Observ Cote Azur, F-06304 Nice 4, France.4 aut
7001 a Mikolaitis, S.u Univ Cote Azur, Lab Lagrange, CNRS, Observ Cote Azur, F-06304 Nice 4, France.4 aut
7001 a Minchev, I.u Leibniz Inst Astrophys Potsdam AIP, D-14482 Potsdam, Germany.4 aut
7001 a Chiappini, C.u Leibniz Inst Astrophys Potsdam AIP, D-14482 Potsdam, Germany.4 aut
7001 a Ruchti, Gregoryu Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science4 aut0 (Swepub:lu)astr-grh
7001 a Gilmore, G.u Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.4 aut
7001 a Randich, S.u Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy.4 aut
7001 a Feltzing, Sofiau Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science4 aut0 (Swepub:lu)astr-sfe
7001 a Bensby, Thomasu Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science4 aut0 (Swepub:lu)astr-tbe
7001 a Flaccomio, E.u Osserv Astron Palermo, INAF, I-90134 Palermo, Italy.4 aut
7001 a Koposov, S. E.u Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.;Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia.4 aut
7001 a Pancino, E.u Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy.;ASI Sci Data Ctr, I-00133 Rome, Italy.4 aut
7001 a Bayo, A.u Univ Valparaiso, Inst Fis & Astron, Valparaiso 2360102, Chile.4 aut
7001 a Costado, M. T.u CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.4 aut
7001 a Franciosini, E.u Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy.4 aut
7001 a Hourihane, A.u Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.4 aut
7001 a Jofre, P.u Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.4 aut
7001 a Lardo, C.u Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5RF, Merseyside, England.4 aut
7001 a Lewis, J.u Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.4 aut
7001 a Lind, Karinu Uppsala universitet,Institutionen för fysik och astronomi4 aut0 (Swepub:uu)karli488
7001 a Magrini, L.u Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy.4 aut
7001 a Morbidelli, L.u Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy.4 aut
7001 a Sacco, G. G.u Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy.4 aut
7001 a Ruchti, G.u Lund Observ, Dept Astron & Theoret Phys, S-22100 Lund, Sweden.4 aut
7001 a Worley, C. C.u Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.4 aut
7001 a Zaggia, S.u Padova Observ, INAF, I-35122 Padua, Italy.4 aut
7102 a Univ Cote Azur, Lab Lagrange, CNRS, Observ Cote Azur, F-06304 Nice 4, France.b Leibniz Inst Astrophys Potsdam AIP, D-14482 Potsdam, Germany.4 org
7730 t Astronomy and Astrophysicsd : EDP Sciencesg 583q 583x 0004-6361x 1432-0746
8564 u https://www.aanda.org/articles/aa/pdf/2015/11/aa25883-15.pdf
8564 u http://dx.doi.org/10.1051/0004-6361/201525883y FULLTEXT
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270606
8564 8u https://doi.org/10.1051/0004-6361/201525883
8564 8u https://lup.lub.lu.se/record/8539586

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